When a Wang Chaogang was established, the amount of land remained unchanged, but the landlord class was very small (descendants of princes and ministers had not yet become landlords). After they occupied a certain amount of land, the number of farmers decreased (after the war), farmers would still have their own land, the politics of founding the country would be clear, and the people would survive easily.

Decades or hundreds of years later, with the increase in the number of farmers, the landlord class also increased. The descendants of the emperor, princes and ministers, and new local landlords were occupied in large quantities. Farmers live entirely on land leased by landlords, with extremely high rents and low productivity. Farmers have only a little food, and the wealth of the people has also been plundered and squandered by the landlord class. The country is getting poorer and the army is short of money. If the equipment is short of money to update, the national strength will be weak, and then there will be natural and man-made disasters (including the invasion of ethnic minorities) or the incompetence of the emperor. At this time, survival will become extremely difficult, and rebellion will occur, further weakening the control of this dynasty over the country and eventually changing the dynasty.